Improvement in middlings-separators



J S'OHOONOVER. Middlings-Separators.

No. 212,406. Patented Feb. 18, I819,

N. PfERS. PHDTO-LITNOGRAFHER, WASHINGTON, D C.

UNITED STATES PATENT @FFTGE.

JAMES SGHOONOVER, ()F JACKSONVILLE, ILLINOIS.

IMPROVEMENT IN MIDDLINGS-SEPARATORS.

Specification forming part of Letters Patent No. 212,406, dated February18, 1879 application filed May 22, 1878.

To all whom "it may concern:

Be it known that 1, JAMES ScnooNoVEn, of Jacksonville, in the county ofMorgan and State of Illinois, have invented a new and useful Improvementin hfitldlings-Purifiers, of which the following is a specification:

My invention consists of a series of independent tapering orfunnel-shaped shoes or boxes, capable of separate attachment to orremoval from their vibratory supports, each containing a top sieve andbottom board, inclined in opposite directions, with an intermediateshort board, inclined in the same general direction as the bottom, andprovided with separate discharge-openings for the materials falling fromsaid two boards, and with an end discharge for the air-currents andoffal, in combination with a blast-fan and a series of airpassages,controlled by valves, to direct the aircnrrents into the large ends ofthe shoes or boxes, substantially as I will now proceed to describe.

Figure l is a side elevation of my middlingspurifier. Fig. 2is anelevation, as seen standing at the foot.

Similar letters and figures of reference indicate corresponding parts.

A represents the spreading-board, which is placed at the head of sieve Bof the upper shoe, A and has a greater inclination than said sieve. Itreceives the middlingsfrom the hopper or spout G and the shaking motionin a longitudinal direction given to the combined sieves B, D, and E bythe crank-shaft F, assisted by the air forced in the same direction bythe blowing-fan Gr, causes the middlings, in their passage toward thefoot of the machine, over the sieve B, to become separated, a portion ofthe finer and heavier middlings dropping through the sieve B onto thecantboa-rd H, and so on and into and out of the spout I. The remaindercontinues toward the foot of the machine. A portion drops through thesieve B, beyond the cant-board H, on to the inclined bottom J, and outof the outlet K and onto the sieveD of the second shoe, A and the partleft on the sieve B, being the coarsest and lightest,'is thrown over thefoot of the machine. The portion which passes onto the sieve D continuestoward the foot of the machine. The finer and heavier parts drop throughthe sieve D onto the cant-board M, and into and out of the spout N. Theremainder continues toward the foot of the machine. A portion dropsthrough the sieve D onto the inclined bottom 0, and so on and out of theoutlet P onto the sieve E of the lower shoe, A The part left on sieve D,being the coarsest and lightest, is thrown over the foot of the machine.The portion which passes onto the sieve E continues toward the foot ofthe machine. The finer and heavier parts drop through the sieve E ontothe inclined bottom S before reaching the spout R, and so on and out ofthe spout T. The balance continues toward the foot of the machine. Thenext lightest and coarsest drops through the sieve E onto the inclinedbottom S, and so on and out of the spout It. The part left on sieve E,being the coarsest and lightest, is thrown over the foot of the machine.

The air blown from the fan Gr, acting at one and the same time with thecombined shaking sieves, cant-boards, and inclined bottoms of theseveral shoes, causes all dust and light particles to be forced towardthe foot of the machine, and thrown into the same body with the lighterand coarser portion of the middlings. The combined action of the shakingsieves, cant-boards, and inclined bottoms of the several shoes, and theblowing-tan thereby causes the middlings passing into and through themachine to be deposited in three separate and distinct bodies, thefinest and heaviest at V, the next at W, and the coarsest and lightestat X.

The shoes are held in position by connect ing-pieces B B and aresupported by springs L L, which allow the shoes to be reciprocatedlongitudinally by means of the crank-shaft F. Stay-rods V assist inholding the shoes in place, and in preventing any transverse lateralmovement thereof.

Through the space between the sieves, cantboards, and inclined bottomsthe blowing-fan Gr impels drafts of air, (said drafts being independently regulated by valves 1 in each inlet,) which take up andconduct all light particles and all dust to the foot of the machine.

The shaft F is driven by a belt from the mill-shaft to pulley 2, and thefan by a belt from pulley 3 to pulley 4.

The space between the sieves and the inclined bottom being constructedwedge-shape, (being largest next the inlet for air,) the air is moreconfined and contracted as it is impelled toward the foot of themachine, and exerts more force as it moves toward the foot of themachine. The air-ducts from the fan G are arranged so as to admit ofbeing teleseoped into shoes or boxes, and to allow an unob-.

structed longitudinal motion of said shoes.

The shoes are arranged so as to leave open spaces between them for freecirculation of air, and they are adapted to be separately removed fromor attached to their supports when desired.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- I In a middlings separator and purifier, a

series of independent tapering orfunnel-shaped shoes or boxes capable ofseparate attachment to or removal from their vibratory supports, eachcontaining atop sieve and bottom board, inclined in opposite directions,with an intermediate short board, inclined in the same general directionas the bottom, and provided with separate discharge-openings for thematerials falling from said two boards, and with an end discharge forthe air-currents and oflal, in combination with a blast-fan and a seriesof air-passages controlled by valves to direct the air-currents into thelarge ends of the shoes or boxes, substantially as described.

J AS. SOHOONOVER.

Attest:

EDWARD P. KIRBY, JOHN M. RAGAN.

